What is Criteria query in hibernate with example?

Hibernate provides alternate ways of manipulating objects and in turn data available in RDBMS tables. One of the methods is Criteria API, which allows you to build up a criteria query object programmatically where you can apply filtration rules and logical conditions.

What is Criteria query in hibernate?

The Hibernate Criteria Query Language (HCQL) is used to fetch the records based on the specific criteria. The Criteria interface provides methods to apply criteria such as retreiving all the records of table whose salary is greater than 50000 etc.

How do I create a criteria query in hibernate 5?

Hibernate 5 – Criteria query example

  1. Create a CriteriaBuilder instance by calling the Session.
  2. Create a query object by creating an instance of the CriteriaQuery interface.
  3. Set the query Root by calling the from() method on the CriteriaQuery object to define a range variable in FROM clause.

How can we get all records using criteria in hibernate?

First we create a session object using the method that might be already known to you and then call createCriteria method supplying it Employee class. This returns a criteria object. In order to fetch all records, list method of criteria is called which returns a java. util.

How can we retrieve data from database using Hibernate Criteria?

Use the beginTransaction() API method again. Now create a new Criteria , using the createCriteria(Class persistentClass) API method of Session for the given Employee class. Use add(Criterion criterion) to add Restrictions to constrain the results to be retrieved. Use methods of Restrictions to constraint the results.

Is Hibernate criteria deprecated?

Since Hibernate 5.2, the Hibernate Criteria API is deprecated, and new development is focused on the JPA Criteria API. We’ll explore how to use Hibernate and JPA to build Criteria Queries.

How does Spring Boot use Hibernate criteria?

  1. Using Criteria API to create criteria: Criteria criteria = session.createCriteria(Student.class);
  2. The Criteria API supports all the comparision operators. such as =, <, >, >=,=<, etc in the supported Expression class eq(), lt(), gt(), le() , ge() respectively.
  3. Criteria ordering query.
  4. Criteria paging the result.